Update pytest from 3.0.7 to 3.1.0 (#77)

pyup.io bot · asvetlov · commit 867c8d8e071c · 2017-05-28T14:08:13.000-07:00
diff --git a/requirements-dev.txt b/requirements-dev.txt
@@ -1,6 +1,6 @@
 -e .
 flake8==3.3.0
-pytest==3.0.7
+pytest==3.1.0
 pytest-cov==2.4.0
 coverage==4.3.4
 sphinx==1.6.2
